I just dont have the energy for it.

I have so much fuel to put into this reality, this body, all this stuff.

I cant just go play make-believe right now.

Jeremy Renner

Jeremy RennerSantiago Felipe / Getty Images

Im still trying to live in reality, Im trying to live.

So it was a hard line for me to cross.

It was a big stretch.

Jeremy Renner

It was very, very challenging for me mentally to get over that hump.

But if it was a very challenging role, I couldnt have taken it.

Renner is set to join Daniel Craig in thenext installment of theKnives Outsaga.